Here's a new one! Tach drive gear thrust

BrianG

Joined

Sep 4, 2009

Messages

106

• Feb 11, 2018

• #1

Does the cam tend to drive the helical-cut tachometer drive gear up and out of the engine case, or does it pull it down and into the case?

 

comnoz

Joined

Dec 10, 2008

Messages

7,253

• Feb 11, 2018

• #2

It tries to push it up, out of the case.

 

Hobot

Joined

Oct 19, 2005

Messages

18,978

• Feb 11, 2018

• #3

As it can't punch up through the case it ends up pulled fully R-ward, which is why cams don't need shims, just decent R thrust washer, w/o tabs.

 

oldbeezer

Joined

Nov 2, 2017

Messages

599

• Feb 11, 2018

• #4

hmmm I thought it depended on which side of the equator you were on.

 

Hobot

Joined

Oct 19, 2005

Messages

18,978

• Feb 11, 2018

• #5

Well duh that's why us N hemisphere guys can screw S hemisphere gals w/o worry d/t their reversed polarity of threads we end up unscrewing. Of course if one of the N/S pair is LH'd, motorcycle hobby could suffer.

 

BrianG

Joined

Sep 4, 2009

Messages

106

• Feb 11, 2018

• #6

Great! Now can somebody give me the mesurement from the flange face of the tach-drive gear housing to the end that goes into the engine case?

 

norcomm76

Joined

Nov 2, 2013

Messages

10

• Feb 12, 2018

• #7

Hello BrianG.
on mine I measure 22.12mm (0.871 ")

 

S

Staytite

Joined

Oct 15, 2011

Messages

451

• Feb 12, 2018

• #8

May I respectfully suggest you guys get proper rulers ; 22.12 mm is 7/8" !

 

baz

VIP MEMBER

Joined

May 26, 2010

Messages

8,531

• Feb 12, 2018

• #9

Staytite said:

May I respectfully suggest you guys get proper rulers ; 22.12 mm is 7/8" !

Click to expand...

Jeez if my old TD teacher heard you use the term "ruler" instead of "a rule" he would wack you round the back of the head with it whilst bellowing in your ear that (a ruler rules a country a rule is for measuring) !!!!!

 

S

Staytite

Joined

Oct 15, 2011

Messages

451

• Feb 12, 2018

• #10

Hi Baz,
I obtained a Grade 1 in Technical drawing "O" level, but a lower grade in English language!
But perhaps a Freudian slip...some proper rulers would be good for the world!
But let's not get political on this web site!
Cheers
Martin

 

L.A.B.

Moderator

VIP MEMBER

Joined

Nov 20, 2004

Messages

21,090

• Feb 12, 2018

• #11

baz said:

Jeez if my old TD teacher heard you use the term "ruler" instead of "a rule" he would wack you round the back of the head with it

Click to expand...

....whack you around......

 

baz

VIP MEMBER

Joined

May 26, 2010

Messages

8,531

• Feb 12, 2018

• #12

Ha ha yep , the funny thing is he was the only teacher in the school that I liked!!!!

 

BrianG

Joined

Sep 4, 2009

Messages

106

• Feb 12, 2018

• #13

Thanks, all!

 

gripper

Joined

Dec 3, 2010

Messages

644

• Feb 14, 2018

• #14

Hey Baz, you didn't go to St Crispins in Wokingham did you? The TD and metalwork teachers were the only two there that I had any respect for